Mutation Testing:测试是否真的能发现错误

  [弱] 耗时 1.0 秒
  >> Generated 29 mutations Killed 10 (34%)
  >> Line Coverage (for mutated classes only): 6/7 (86%)
  各状态的变异数: {'SURVIVED': 13, 'KILLED': 10, 'NO_COVERAGE': 6}
  存活 / 未覆盖的变异(类 方法 行 变异器 → 状态):
    行  4  方法 clamp        ConditionalsBoundaryMutator          SURVIVED
    行  4  方法 clamp        ConditionalsBoundaryMutator          SURVIVED
    行  4  方法 clamp        PrimitiveReturnsMutator              NO_COVERAGE
    行  4  方法 clamp        PrimitiveReturnsMutator              NO_COVERAGE
    行  2  方法 discount     ConditionalsBoundaryMutator          SURVIVED
    行  2  方法 discount     ConditionalsBoundaryMutator          SURVIVED
    行  2  方法 discount     IncrementsMutator                    SURVIVED
    行  2  方法 discount     NegateConditionalsMutator            SURVIVED
    行  2  方法 discount     NegateConditionalsMutator            SURVIVED
    行  2  方法 discount     NegateConditionalsMutator            SURVIVED
    行  2  方法 discount     PrimitiveReturnsMutator              SURVIVED
    行  5  方法 grade        ConditionalsBoundaryMutator          SURVIVED
    行  5  方法 grade        ConditionalsBoundaryMutator          NO_COVERAGE
    行  5  方法 grade        NegateConditionalsMutator            NO_COVERAGE
    行  5  方法 grade        EmptyObjectReturnValsMutator         NO_COVERAGE
    行  5  方法 grade        EmptyObjectReturnValsMutator         NO_COVERAGE
    行  3  方法 isAdult      ConditionalsBoundaryMutator          SURVIVED
    行  7  方法 log          VoidMethodCallMutator                SURVIVED
    行  6  方法 sumPositive  ConditionalsBoundaryMutator          SURVIVED

  [强] 耗时 1.0 秒
  >> Generated 29 mutations Killed 24 (83%)
  >> Line Coverage (for mutated classes only): 5/7 (71%)
  各状态的变异数: {'SURVIVED': 4, 'KILLED': 24, 'NO_COVERAGE': 1}
    行  4  方法 clamp        ConditionalsBoundaryMutator          SURVIVED
    行  4  方法 clamp        ConditionalsBoundaryMutator          SURVIVED
    行  4  方法 clamp        PrimitiveReturnsMutator              SURVIVED
    行  7  方法 log          VoidMethodCallMutator                NO_COVERAGE
    行  6  方法 sumPositive  ConditionalsBoundaryMutator          SURVIVED

    BooleanTrueReturnValsMutator             {'KILLED': 1}
    ConditionalsBoundaryMutator              {'SURVIVED': 7, 'NO_COVERAGE': 1}
    EmptyObjectReturnValsMutator             {'KILLED': 1, 'NO_COVERAGE': 2}
    IncrementsMutator                        {'SURVIVED': 1}
    MathMutator                              {'KILLED': 1}
    NegateConditionalsMutator                {'KILLED': 5, 'SURVIVED': 3, 'NO_COVERAGE': 1}
    PrimitiveReturnsMutator                  {'NO_COVERAGE': 2, 'KILLED': 2, 'SURVIVED': 1}
    VoidMethodCallMutator                    {'SURVIVED': 1}

  [更强] 耗时 1.0 秒
  >> Generated 29 mutations Killed 26 (90%)
  >> Line Coverage (for mutated classes only): 6/7 (86%)
  各状态的变异数: {'SURVIVED': 3, 'KILLED': 26}
    行  4  方法 clamp        ConditionalsBoundaryMutator          SURVIVED
    行  4  方法 clamp        ConditionalsBoundaryMutator          SURVIVED
    行  6  方法 sumPositive  ConditionalsBoundaryMutator          SURVIVED